TEDE Coleção: Programa de Pós-Graduação em BioenergiaPrograma de Pós-Graduação em Bioenergiahttp://tede.unicentro.br:8080/jspui/handle/tede/5552024-03-28T06:00:50Z2024-03-28T06:00:50ZProdução de células solares de TiO2/Nb sensibilizadas com corantes naturaisOLIVEIRA, MARCEL RICARDO NOGUEIRA DEhttp://tede.unicentro.br:8080/jspui/handle/jspui/21402024-02-02T03:30:58Z2022-06-02T00:00:00ZTítulo: Produção de células solares de TiO2/Nb sensibilizadas com corantes naturais
Autor: OLIVEIRA, MARCEL RICARDO NOGUEIRA DE
Primeiro orientador: Gallina, André Lazarin
Abstract: Dye sensitized solar cells (DSSC) are promisors devices for solar energy conversion.
They are produced by the use of a semiconductor oxide and photosensitive material. To
improve the photoconversion energy efficiency, a mix of oxides is applied and dyes
extracted from natural products can be used when the objective is to produce a low-cost
system. This work aims to develop and evaluate a DSSC with Ti and Nb sensitized with
dyes extracted from Capsicum Anuum and Curcuma Longa. For the inorganic analysis,
Scanning Electron Microscopy (SEM), X-ray Fluorescence (XRF), and X-ray Diffraction
(XRD) will be used. To electrochemical analysis, j-V curves, photochronoamperometic
measurement (j-t), and Open Circuito Potential (OCP) will be performed. As a result of
the corresponding partial analyzes during the oxide synthesis, it was observed that is
possible to produce Ti/Nb particles by the Pechini methodology, with high crystallinity
and mix of rutile and anatase forms. Electrochemical results showed an improving in
photoconversion energy cell efficiency with 25% to Curcuma longa and 12% to Capsium
Anuum when Nb was inserted.
Instituição: Universidade Estadual do Centro-Oeste
Tipo do documento: Dissertação2022-06-02T00:00:00ZCORANTES NATURAIS DE BATATA-DOCE ROXA E FRUTAS TROPICAIS APLICADOS EM CSSCTHEISEN, RAFAELhttp://tede.unicentro.br:8080/jspui/handle/jspui/21392024-02-02T03:30:45Z2022-12-16T00:00:00ZTítulo: CORANTES NATURAIS DE BATATA-DOCE ROXA E FRUTAS TROPICAIS APLICADOS EM CSSC
Autor: THEISEN, RAFAEL
Primeiro orientador: Rodrigues, Paulo Rogério Pinto
Abstract: The search for technologies that facilitate the reduction of dependence on fossil fuels as
a primary energy source has been intensifying in recent years, through photovoltaic
conversion has a prominent position for presenting low maintenance, long useful life,
possibility of being installed in places remote areas and also because it is a form of clean
energy. The main technology in this sector, cells built on silicon base have a high value
in the cost of implantation. In order to seek more accessible ways, new projects, such as
third-generation solar cells, are gaining prominence. These are emerging technologies,
and among them are dye-sensitized solar cells (DSSC). They may have advantages in
relation to the cost of production, versatility and diversity of materials that can be used in
their manufacture. In these cells, semiconductor oxides such as TiO2 are used, combined
with organic sensitizers (dyes). Synthetic dyes such as N719 have a high added value to
their synthesis and distribution and, in order to reduce costs, another class of dyes can be
used, being extracted from flowers and fruits. In plant diversity, many metabolites caused
such as flavonoids, anthocyanins and carotenoids that in plants help against ultraviolet
rays, absorbing sunlight. These have chromophore groups with photosensitivity
characteristics, and this allows their use in DSSC. This dissertation aims to evaluate the
efficiency of DSSC with natural dyes extracted from “in-natura” samples present in the
epicarp (peel) of the National Black Plum (Prunus domestica L.), the skin of the Imported
Black Plum (Prunus salicina L.), from the bark of the Purple Sweet Potato (Ipomoea
Batatas L. Lam.), from the bark of Cambuí (Myrciaria Myciaria tenella) and also from
the fruit of Myrtle (Eugenia gracílima Kiaersk). For use, a 70/30% methanol/water (v/v)
solution is used, which is acidified at 3% with citric acid (m/v). For each sample, the
screening of coloring substances was carried out in the proportion 1:1 (m/v), in order to
obtain concentrated extracts, a second test was carried out for the same extract diluted in
50% of its concentration. For the extracts, the following were performed: quantification
of anthocyanins by the differential pH method, UV-Vis Spectroscopy tests with 510nm
absorption and Fourier Transform Spectroscopy (FT-IR). Electrochemical Impedance
Spectroscopy (EIS) and Charge Extraction as a function of Time. The effects of
electrochemical recombination were observed by Intensity Modulated Photocurrent
Spectroscopy (IMPS) and Intensity Modulated Photovoltage Spectroscopy (IMVS). The
photovoltaic devices were characterized by Photochronoamperometry, Current Density
Curves vs Potential (j-V) the DSSC that stood out was for Plum A, showing Jsc=
0.482mA cm-2, Voc= 0.495V, FF= 0.374 and η= 0.0892% efficiency for the studied
methodology.
Instituição: Universidade Estadual do Centro-Oeste
Tipo do documento: Dissertação2022-12-16T00:00:00ZVIABILIDADE TÉCNICO-ECONÔMICA DA PRODUÇÃO DE BIOMETANO E ENERGIA ELÉTRICA A PARTIR DA FRAÇÃO ORGÂNICA DE RESÍDUOS SÓLIDOS URBANOS GERADOS NO MUNICÍPIO DE GUARAPUAVA-PRLIMA, GABRIEL MENON DEhttp://tede.unicentro.br:8080/jspui/handle/jspui/21382024-02-02T03:30:51Z2022-09-30T00:00:00ZTítulo: VIABILIDADE TÉCNICO-ECONÔMICA DA PRODUÇÃO DE BIOMETANO E ENERGIA ELÉTRICA A PARTIR DA FRAÇÃO ORGÂNICA DE RESÍDUOS SÓLIDOS URBANOS GERADOS NO MUNICÍPIO DE GUARAPUAVA-PR
Autor: LIMA, GABRIEL MENON DE
Primeiro orientador: Schirmer, Waldir Nagel
Abstract: The anaerobic digestion of the organic fraction of municipal solid waste (MSW) is an important technology for energy production, corroborating the increase in the useful life of the landfill and the reduction of greenhouse gases (GHG) emissions in the waste management sector. In this context, studies on the economic aspects can help decision making about investments in energy recovery projects of these plants. Thus, this work aimed to analyze the economic viability of two hypothetical projects of energy production through anaerobic digestion of the organic fraction of municipal solid waste (OFMSW) in the sanitary landfill of Guarapuava county, Paraná State: the first project (P1) aimed at the production of biomethane for commercialization; and the second project (P2) aimed at producing biomethane for conversion into electrical energy. To this end, the amount of biomethane and the electrical power available were calculated from estimates of the amount of MSW destined for the sanitary landfill between 2023 and 2042. It was still estimated the costs of installation, operation and maintenance of the plant in the two projects, and the billing was calculated for selling biomethane, decarbonization credits (CBIOs), electricity, recyclable materials and the provision of services on the final disposal of MSW in the sanitary landfill. Through the calculation of the net present value (NPV), it was concluded that there is no economic feasibility for the implementation of P1 and P2 projects. The NPV sensitivity analysis was carried out considering the reduction of the highest investments and costs group of the projects, noting that the economic viability of the projects is linked to a equal or greater reduction than 70% and 80% of these expenses in P1 and P2, respectively. The results show the needing to develop more consistent policies and economic incentives for the use of the anaerobic digestion technological route to generate energy in sanitary landfills in municipalities with population characteristics similar to Guarapuava.
Instituição: Universidade Estadual do Centro-Oeste
Tipo do documento: Dissertação2022-09-30T00:00:00ZPOTENCIAL DA BIOMASSA AGROINDUSTRIAL PARA PRODUÇÃO DE PELLETSLIMA, RENATO RODRIGO MENON DEhttp://tede.unicentro.br:8080/jspui/handle/jspui/21372024-02-02T03:30:55Z2022-08-19T00:00:00ZTítulo: POTENCIAL DA BIOMASSA AGROINDUSTRIAL PARA PRODUÇÃO DE PELLETS
Autor: LIMA, RENATO RODRIGO MENON DE
Primeiro orientador: Watzlawick, Luciano Farinha
Abstract: The research on the potential use of residual biomass for the production of alternative
solid biofuels can contribute to the development of a country's energetic matrix from renewable sources. The present work analyzed the parameters determined by the European standard ENplus ISO 17225 (2014) aiming to enable technically the production of pellets from pine wood shavings (PMP), onion husk (PCC), corn cob (PSM) and barley bagasse residues. (PBC). Bulk density, gross heating value, ash content, volatile material content, fixed carbon and mechanical durability of the pellets were analyzed. Also, analysis of variance and statistical correlation of the parameters of the produced pellets were performed. It was found that there is a correlation between the gross heating value, content of volatile materials and ash content in non-woody pellets. The results were compared with requirements established by ENplus ISO 17225 (2014). The samples of PMP, PCC and PBC failed the requirements of the standard. However, biomass of agro-industrial residues of pine wood shavings, onion husks and barley bagasse have potential for energy generation and it is possible to improve the quality of the produced pellets from temperature and pressure adjustments in the pelletization process, pellet cooling after material densification and addition of binder compounds to the raw material. The PSM sample passed the requirements of the standard, and it is concluded that corn cob is an important potential biomass for the development of bioenergy in Brazil and can be used to manufacture pellets for industrial use with the possibility of commercialization in the foreign market.
Instituição: Universidade Estadual do Centro-Oeste
Tipo do documento: Dissertação2022-08-19T00:00:00Z